Effect of torrefaction temperature on energy properties of spent coffee ground

Bangkha, Natthanant; Saechua, Wanphut; Nuamyakul, Tharathip; Jongyingcharoen, Jiraporn Sripinyowanich

doi:10.1051/e3sconf/202018703009

Cited by 3 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Limousy et al [69] obtained an energy yield in the range of 88 to 99% for coffee residues. Bangkha et al [70] also obtained an energy yield between 58.7 and 99.4% for spent coffee grounds.…”

Section: Calorific Value Of Torrefied Corncobsmentioning

confidence: 92%

Investigation of the Effects of Torrefaction Temperature and Residence Time on the Fuel Quality of Corncobs in a Fixed-Bed Reactor

et al. 2022

View full text Add to dashboard Cite

Biomass from agriculture is a promising alternative fuel due to its carbon-neutral feature. However, raw biomass does not have properties required for its direct utilization for energy generation. Torrefaction is considered as a pretreatment method to improve the properties of biomass for energy applications. This study was aimed at investigating the effects of torrefaction temperature and residence time on some physical and chemical properties of torrefied corncobs. Therefore, a fixed-bed torrefaction reactor was developed and used in the torrefaction of corncobs. The torrefaction process parameters investigated were the torrefaction temperature (200, 240, and 280 °C) and the residence time (30, 60, and 90 min). The effects of these parameters on the mass loss, grindability, chemical composition, and calorific value of biomass were investigated. It was shown that the mass loss increased with increasing torrefaction temperature and residence time. The grinding throughput of the biomass was improved by increasing both the torrefaction temperature and the residence time. Torrefaction at higher temperatures and longer residence times had greater effects on the reduction in particle size of the milled corncobs. The calorific value was highest at a torrefaction temperature of 280 °C and a residence time of 90 min. The energy yield for all treatments ranged between 92.8 and 99.2%. The results obtained in this study could be useful in the operation and design of torrefaction reactors. They also provided insight into parameters to be investigated for optimization of the torrefaction reactor.

show abstract

Section: Calorific Value Of Torrefied Corncobsmentioning

confidence: 92%

Investigation of the Effects of Torrefaction Temperature and Residence Time on the Fuel Quality of Corncobs in a Fixed-Bed Reactor

et al. 2022

View full text Add to dashboard Cite

show abstract

A study on torrefaction of spent coffee ground to improve its fuel properties

Nepal

Kim

Poudel

et al. 2022

Fuel

View full text Add to dashboard Cite

Relationship between Odor Adsorption Ability and Physical–Hydraulic Properties of Torrefied Biomass: Initial Study

et al. 2023

View full text Add to dashboard Cite

Various techniques are implemented to reduce odor emission due to their potential multi-source nature. One modern approach is the use of thermochemically processed biomass to eliminate odors. Compared with raw biomass, processed biomass is characterized by greater porosity and an expanded specific surface. In these laboratory experiments, adsorption tests for a mixture of indole, 2,3-dimethylpyrazine, and 2,3,5-trimethylpyrazine are carried out using torreficates produced from biomass from the agri-food industry (walnut shells, orange peels, peach stones, and apple wood chips). This research is focused on the determination of the correlation between the physical-hydraulic properties of the torreficates and their ability to reduce the odors simulated by the selected compounds. The results indicate that 2,3-dimethylpyrazine and 2,3,5-trimethylpyrazine are not detected in any of the investigated low-temperature biochars. However, indole is detected in most materials, and its most significant quantities are adsorbed on torreficates made of orange peels (45.64 µg·mL−1 ± 40.02 µg·mL−1) and peach stones (61.26 µg·mL−1 ± 49.55 µg·mL−1). The performed analysis reveals that the highest correlation with the ability to adsorb indole is found for the average pore size (r = 0.66) and specific density (r = −0.63) as well as the content of fixed carbon (r = 0.66), which may prove the importance of physical-hydraulic properties in odor sorption by low-temperature torreficates.

show abstract

Effect of torrefaction temperature on energy properties of spent coffee ground

Cited by 3 publications

References 6 publications

Investigation of the Effects of Torrefaction Temperature and Residence Time on the Fuel Quality of Corncobs in a Fixed-Bed Reactor

Investigation of the Effects of Torrefaction Temperature and Residence Time on the Fuel Quality of Corncobs in a Fixed-Bed Reactor

A study on torrefaction of spent coffee ground to improve its fuel properties

Relationship between Odor Adsorption Ability and Physical–Hydraulic Properties of Torrefied Biomass: Initial Study

Contact Info

Product

Resources

About